I say "eh" a lot & it means more then 1 thing..
-Nice weather eh? meaning "right", or "correct"
-What ya doin eh? damned if I know, but I say it a lot
-eh? meaning, "pardon me" or "what" or "what the hell are you talking about?" or are you crazy?"

Honestly I have no idea what "eh" means 1/2 the time, but its forever trapped in my vocab Its how people know I'm Canadian